Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f97f069593bf47…

MALICIOUS

PDF

71.1 KB Created: 2021-06-11 05:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51fcbe6093f9b402f150d24f257784fc SHA-1: 93b4c8f59b24eb3aecf6dce201176cb8ad878942 SHA-256: a2f97f069593bf4754d5a6bd77e6175a2eac01cc756207729f4dfdd4244ec199
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/pbw?utm_term=aimbot+hack+for+pubg+mobile+download PDF link annotation
    • https://kumisorulilinim.weebly.com/uploads/1/3/4/7/134750082/7218135.pdfIn PDF document text
    • https://mamafaxugelat.weebly.com/uploads/1/3/0/8/130813750/dokiru.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/koloxojawo_fabemupafaxupe.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/927d30c0367.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/7ecc070d8.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/sazifisik.pdfIn PDF document text
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/afb966b33cafeb.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/6971188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_603c54d65ae39.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/6ca4f77.pdfIn PDF document text
    • https://pevumufaropis.weebly.com/uploads/1/3/4/7/134706438/voresaxiko_supimilomobij_xerefiwug.pdfIn PDF document text
    • https://bowemubunewoseg.weebly.com/uploads/1/3/0/7/130739536/kawutebidef-ribinapezexu-latevubag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_6020a72ddffac.pdfIn PDF document text
    • https://dukazegisow.weebly.com/uploads/1/3/0/7/130740117/wufexakimejoxokutem.pdfIn PDF document text
    • https://dujedagopodiku.weebly.com/uploads/1/3/4/5/134580966/2231757.pdfIn PDF document text
    • https://wosaboler.weebly.com/uploads/1/3/4/4/134496590/nimogoxifilonepetag.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/f78c4462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96902fee-9342-4c96-9829-5cb7a5fe464e/manual_de_gramtica_italiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cf27c3-6db6-44da-9f1f-1ab98099801e/dark_souls_2_save_editor_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ad6339-ec41-4676-a7e4-ced566ca653d/nozen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 5676 bytes
SHA-256: 780b97c4e12dedfdd1f5bb8d8f887e6b6262a3cd2304db3bae7cfddda97bc046
font_01_sfnt_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 10596 bytes
SHA-256: c8373f1e51adaec2afd8a8f24211edb627af4c9d051e80567d2f5101dbbbe711

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